IMPORTANT NOTE: This suction cup device must be applied on non-porous, texture-free, flat and smooth surfaces, such as glass, tile, fiber glass. CAUTION: Shower grab bar must be reattached before each use, and cannot hold full body weight. Do NOT apply over a grout line. Tiles should be 5x 5 or larger. Tool-Free Installation: Please Clean and dry both surfaces of suction cups and wall, hold the shower handle and press suction cups firmly into place, then push them to the wall as near as possible, then lock down both levers completely to secure. Powerful Support: Grab bars for bathroom is perfect for use in the bathroom, Providing you extra stability when entering or leaving the bathtub or shower for a safe and comfortable experience. Perfect for seniors disabled kid pregnant woman.